CN103143804A - Ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal - Google Patents
Ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal Download PDFInfo
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- CN103143804A CN103143804A CN2013100822073A CN201310082207A CN103143804A CN 103143804 A CN103143804 A CN 103143804A CN 2013100822073 A CN2013100822073 A CN 2013100822073A CN 201310082207 A CN201310082207 A CN 201310082207A CN 103143804 A CN103143804 A CN 103143804A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 128
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 97
- 239000010936 titanium Substances 0.000 title claims abstract description 95
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 75
- 239000002184 metal Substances 0.000 title claims abstract description 75
- 238000005219 brazing Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000004907 flux Effects 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 32
- 238000005269 aluminizing Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000004411 aluminium Substances 0.000 claims description 90
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical group CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 44
- 238000003466 welding Methods 0.000 claims description 35
- 238000005476 soldering Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 10
- 244000137852 Petrea volubilis Species 0.000 claims description 9
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 4
- 239000000356 contaminant Substances 0.000 claims description 2
- 229910000765 intermetallic Inorganic materials 0.000 abstract description 10
- 238000007747 plating Methods 0.000 abstract description 6
- 238000003892 spreading Methods 0.000 abstract description 6
- 230000007480 spreading Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 abstract 4
- 229910000679 solder Inorganic materials 0.000 description 16
- 230000008569 process Effects 0.000 description 13
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 9
- 238000009736 wetting Methods 0.000 description 8
- 229910001069 Ti alloy Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- 238000005255 carburizing Methods 0.000 description 3
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- 238000005272 metallurgy Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 229910004349 Ti-Al Inorganic materials 0.000 description 2
- 229910004692 Ti—Al Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
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- 238000000576 coating method Methods 0.000 description 2
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- 238000010406 interfacial reaction Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
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Abstract
The invention relates to an ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal, which comprises the steps of conducting hot dip aluminum plating on a titanium plate before brazing to form an aluminizing layer in a certain thickness on the surface of the titanium plate, heating with combustible gas flame to melt an NOCOLOK brazing flux and aluminum silicon brazing filler metal, applying ultrasonic vibration on an overlapping part of a joint till the aluminum silicon brazing filler metal is solidified, and obtaining a titanium and aluminum overlap joint. The method has the main characteristics that the subsequent titanium and aluminum brazing is changed into the brazing of an aluminum plate and the aluminizing layer; the method improves wet spreading ability of the aluminum silicon brazing filler metal on the surface of the aluminized titanium plate and solves the problem that the aluminum silicon brazing filler metal difficultly wets a titanium base during the brazing; layered continuous distribution of an intermetallic compound on a brazing interface reaction layer of the joint is broken; the intermetallic compound is granulated and diffused; and the method facilitates acquirement of the high-quality titanium and aluminum dissimilar metal brazed joint.
Description
Technical field
The present invention relates to welding technology field, specifically a kind of titanium, the ultrasonic booster flame method for welding of aluminum dissimilar metal.
Background technology
Titanium alloy and aluminium alloy have been widely used in the fields such as Aeronautics and Astronautics and automobile as light-weight high-strength material.Titanium alloy has high specific strength and good low-temperature flexibility, good corrosion resistance, yet its expensive serious extensive application that limits titanium alloy.The aluminium alloy plasticity and toughness are good, light specific gravity, and with respect to titanium alloy, aluminium alloy all has obvious advantage aspect cost, however intensity of aluminum alloy and heat resistance are not good, have limited its further application yet.Titanium aluminum dissimilar metal composite component both can have been taken into account two kinds of metals characteristic separately, received the effect of making the best use of everything, and had reduced to a great extent again cost, helped simultaneously to realize lightweight, the structure-function integration requirement of modern industry.Therefore, titanium aluminium composite component has boundless application prospect in above-mentioned field, and the connectivity problem of titanium aluminum dissimilar metal has also caused scholars' great attention and extensive concern in the industry in recent years.
The reliable connection that how to realize the titanium aluminum dissimilar metal is the key that enlarges its application, gives full play to its unique advantage, be also perplexing always scholar in the industry subject matter and where the shoe pinches.Because titanium, aluminum dissimilar metal are huge in aspect differences such as lattice types, lattice paprmeter, atomic number, electronegativity, there is not the describing property on metallurgy, under room temperature, titanium atom is very little in the intracell solid solubility of aluminium, easily generate the intermetallic compound of multiple fragility in welding process, and both the physical and chemical performance such as thermal conductivity, linear expansion coefficient difference is also very large, easily cause titanium aluminium jointing to have larger residual stress, make joint easily produce low stress damage, reduced the serviceability of joint.
With regard to the present literature content of grasping, the method of attachment of titanium, aluminum dissimilar metal mainly contains soldering, diffusion welding (DW), Laser Welding, friction welding (FW) and molten soldering etc., wherein molten soldering can be divided into the molten soldering of laser, the molten soldering of electron beam and the molten soldering of electric arc etc. according to the thermal source difference that adopts, and common fusion welding method generates in weld seam because a large amount of fusings of mother metal in connection procedure cause that between a large amount of brittle metals, compound makes the joint performance severe exacerbation, has not been suitable for the connection of titanium, aluminum dissimilar metal.In said method, exist al-si filler metal to be difficult to the problem of wetting and spreading when brazing of titanium, aluminum dissimilar metal, though diffusion welding (DW) can realize its connection preferably, but rely on the counterdiffusion of atom phase to make the connection cycle longer, and vacuum brazing and diffusion welding (DW) equipment have larger restriction to Workpiece structure and size, and Laser Welding is had relatively high expectations to workpiece fit-up gap and surface state.Friction stir welding belongs to solid-state connection category, and in connection procedure, the titanium aluminum mother plate is solid-state, can greatly reduce the generation quantity of intermetallic compound, be considered to connect the method for optimizing of titanium, aluminium, but it still is subject to the larger restriction of workpiece shape and size.
Gas brazing is to utilize imflammable gas flame to add heat fusion joint lower than extremely fusing of the solder that is connected mother metal, makes it sprawl and finally realize with a series of physical reactions of mother metal generation the method that it is connected at solid-state mother metal moistened surface.Gas brazing titanium, aluminum dissimilar metal, because brazing temperature is lower, lower than the fusing point of aluminum mother plate, in brazing process, titanium, aluminum mother plate all keep solid-state, and only solder melts, can reduce to a certain extent the generation quantity of intermetallic compound, and can make the joint homogeneous heating by adjusting the flame heating location, connector temperature is evenly distributed help the uniformity of organizing with performance, and gas brazing be simple and convenient, practical, be suitable for engineering site and use.At present the difficult point of brazing of titanium, aluminum dissimilar metal is, aluminium base solder is difficult to wetting and spreading on titanium mother metal surface, is difficult to obtain perfect sunken joint after soldering.Therefore, how to solve aluminium base solder and the wetting and spreading problem of titanium mother metal is successfully the key of brazing filler metal titanium aluminum dissimilar metal.
Summary of the invention
The object of the present invention is to provide the ultrasonic booster flame method for welding of a kind of titanium, aluminum dissimilar metal, solve the problem that in common brazing process, aluminium base solder is difficult to wetting titanium mother metal, realize the reliable brazing filler metal of titanium, aluminum dissimilar metal.
For achieving the above object, the invention provides a kind of titanium, the ultrasonic booster flame method for welding of aluminum dissimilar metal, specifically comprise the following steps:
(1) titanium plate surface heat dip calorizing
The super-purified aluminium welding wire section of being cut into that surface treatment is clean is put into graphite crucible, graphite crucible is heated to 700 ℃～750 ℃ makes the super-purified aluminium welding wire fusing, and insulation is above to guarantee the temperature of aluminum liquid homogenising half an hour; To be connected titanium plate end removal oxide-film and greasy dirt; The NOCOLOK brazing flux is dissolved in acetone forms suspension, brush in the positive and negative surface of the end of titanium plate 10～20mm width; The titanium plate that will scribble brazing flux one side after the acetone volatilization is dipped vertically in aluminium liquid, keeps at the uniform velocity extracting out with the speed of 2cm/s～3cm/s after 0.5～3min, completes hot-dip, forms aluminium coated;
(2) the aluminize ultrasonic booster flame soldering of titanium plate and aluminium sheet
The aluminium sheet overlap is removed surface film oxide and greasy dirt, the NOCOLOK brazing flux is applied to overlap, titanium plate and the aluminium sheet completed after hot-dip aluminizing are assembled into lap joint, lap width is less than the aluminium coated width, al-si filler metal is positioned over overlap one side, with the heating of imflammable gas flame, NOCOLOK brazing flux and al-si filler metal are successively melted, ultrasonic vibration is imposed on joint overlap to al-si filler metal solidifies, obtain titanium, aluminium lap joint, postwelding obtains the good titanium of brazing quality/aluminium lap joint.
The present invention also has following feature:
1, above-described NOCOLOK brazing flux or be active stronger chloride and fluoride mixing brazing flux.
2, above-described imflammable gas flame is acetylene and oxygen flame.
3, in above-described step (1), the super-purified aluminium welding wire that surface treatment is clean is removed the super-purified aluminium welding wire surface and oil contaminant for the wiping of employing acetone.
4, in above-described step (2), the aluminium sheet overlap is removed surface film oxide and greasy dirt for adopting sand paper and acetone cleaning wipe oil.
Effect of the present invention is:
(1) at titanium plate surface heat dip calorizing as pre-treating technology, make the certain thickness aluminum layer of titanium plate surface formation, due to al-si filler metal and aluminium coated without the problem such as metallurgy is incompatible, greatly improved al-si filler metal in the wetting and spreading ability on titanium plate surface of aluminizing, make the brazing process of follow-up titanium-aluminum dissimilar metal become the brazing process of aluminium sheet and aluminium coat, reduced the soldering difficulty.
(2) adopt fluoride, chloride mixing brazing flux as fluxing agent, improved the wettability of aluminium liquid to the titanium matrix, and due to the hot-dip process temperature and the immersion plating time controlled, be easy to obtain the coating good with the matrix metallurgical binding, and thickness of coating is variable.
(3) due to the immersion plating temperature far below the titanium fusing point, the hot-dip time is shorter, and temperature distribution uniform in aluminium liquid, has limited in the hot-dip process raised growth of Ti-Al series metal compounds on titanium and aluminium coated interface, and has made it thinning.
(4) in brazing process, aluminium sheet and titanium plate are solid phase, do not melt, and have reduced aluminium atom and titanium atom to a large amount of dissolvings of interfacial reaction layer, and simultaneously brazing temperature is low makes that the intermetallic compounds layer that forms when aluminizing is unlikely too grows up.Thereby the element silicon in al-si filler metal can replace the raised growth that the position of Ti-Al series intermetallic compound aluminium atom suppresses compound between brittle metal.
(5) titanium plate and aluminium sheet overlap are imposed ultrasonic vibration; utilize the continuous layered arrangement that the acoustic streaming effect of sound wave and cavitation can broken joint intermetallic compound; make its granulating, dispersion; help to improve joint performance; the butt joint that applies of ultrasonic vibration simultaneously has squeezing action; be conducive to improve the compactness of soldered fitting, the generation of reduce injection defect.
The ultrasonic booster flame method for welding of titanium-aluminum dissimilar metal provided by the present invention, simple, be subjected to the restrictions such as workpiece size and complex-shaped property little, be suitable for practical implementation, very large actual application value is arranged.
Description of drawings
Hot-dip aluminizing process schematic diagram in Fig. 1 resistance furnace;
Fig. 2 aluminize titanium plate and the ultrasonic booster flame soldering of aluminium sheet schematic diagram;
Fig. 3 shape appearance figure after titanium plate and aluminium sheet gas brazing joint tension failure of aluminizing;
In figure, 1, the titanium plate, 2, graphite crucible, 3, aluminium liquid, 4, heating wire, 5, al-si filler metal, 6, aluminium coated, 7, aluminium sheet, 8, the flame torch, 9, the ultrasonic vibration generating means.
The specific embodiment
The invention will be further described for example below in conjunction with Figure of description:
Embodiment 1
The invention provides a kind of titanium, the ultrasonic booster flame method for welding of aluminum dissimilar metal, it comprises the following steps:
(1) hot-dip aluminizing
To be cut into segment with the super-purified aluminium welding wire of acetone wiping wipe oil and put into graphite crucible 2, and graphite crucible 2 be put into stove with heating wire 4 be heated to 700 ℃ and make the super-purified aluminium welding wire fusing, more than insulation half an hour, to guarantee aluminium liquid 3 equalizing temperatures.To be connected titanium plate 1 end cleans with the sand paper cleaning and with acetone and removes oxide-film and greasy dirt.The NOCOLOK brazing flux is dissolved in acetone forms suspension, brush in the positive and negative surface of the width of titanium plate 1 end 10mm.The titanium plate 1 that will scribble brazing flux one side after the acetone volatilization is dipped vertically in aluminium liquid 3, keeps at the uniform velocity extracting out with the speed of 2cm/s after 0.5min, completes hot-dip, forms aluminium coated 6.
(2) the aluminize ultrasonic booster flame soldering of titanium plate and aluminium sheet
aluminium sheet 7 overlaps are cleared up to remove surface film oxide and greasy dirt with sand paper and acetone, the NOCOLOK brazing flux is applied to overlap, the titanium plate 1 of completing after hot-dip aluminizing is assembled into lap joint with aluminium sheet 7, lap width is slightly less than the aluminium coated width, appropriate al-si filler metal 5 is positioned over overlap one side, use imflammable gas flame: acetylene and oxygen, 8 heating of flame torch make NOCOLOK brazing flux and successively fusing of al-si filler metal 5, the ultrasonic vibration that ultrasonic vibration generating means 9 is produced imposes on joint overlap to al-si filler metal 5 and solidifies, postwelding obtains the good titanium of brazing quality/aluminium lap joint.
A kind of titanium, the ultrasonic booster flame method for welding of aluminum dissimilar metal, it comprises the following steps:
(1) hot-dip aluminizing
To be cut into segment with the super-purified aluminium welding wire of acetone wiping wipe oil and put into graphite crucible 2, and graphite crucible 2 be put into stove with heating wire 4 be heated to 750 ℃ and make the super-purified aluminium welding wire fusing, more than insulation half an hour, to guarantee aluminium liquid 3 equalizing temperatures.To be connected titanium plate 1 end cleans with the sand paper cleaning and with acetone and removes oxide-film and greasy dirt.The NOCOLOK brazing flux is dissolved in acetone forms suspension, brush in the positive and negative surface of the width of titanium plate 1 end 20mm.The titanium plate 1 that will scribble brazing flux one side after the acetone volatilization is dipped vertically in aluminium liquid 3, keeps at the uniform velocity extracting out with the speed of 3cm/s after 3min, completes hot-dip, forms aluminium coated 6.
(2) the aluminize ultrasonic booster flame soldering of titanium plate and aluminium sheet
aluminium sheet 7 overlaps are cleared up to remove surface film oxide and greasy dirt with sand paper and acetone, the NOCOLOK brazing flux is applied to overlap, the titanium plate 1 of completing after hot-dip aluminizing is assembled into lap joint with aluminium sheet 7, lap width is slightly less than the aluminium coated width, appropriate al-si filler metal 5 is positioned over overlap one side, use imflammable gas flame: acetylene and oxygen, 8 heating of flame torch make NOCOLOK brazing flux and successively fusing of al-si filler metal 5, the ultrasonic vibration that ultrasonic vibration generating means 9 is produced imposes on joint overlap to al-si filler metal 5 and solidifies, postwelding obtains the good titanium of brazing quality/aluminium lap joint.
The present invention selects the titanium plate is carried out hot-dip aluminizing as pre-treating technology, due to aluminium coated and al-si filler metal without the problem such as metallurgy is incompatible, greatly improve the wettability of al-si filler metal to the titanium plate surface of aluminizing, solved the problem that al-si filler metal in the brazing process is difficult to wetting titanium mother metal.Imposing ultrasonic vibration to solder in the rear butt joint of solder fusing simultaneously solidifies; utilize the stratiform continuous distributed of intermetallic compound in the broken brazed seam crystallization process of the acoustic streaming effect of ultrasonic vibration and cavitation and make its granulating, dispersion; can improve the compactness of soldered fitting again; be easy to realize the reliable brazing filler metal of titanium-aluminum dissimilar metal, obtain the high-quality joint.
Mother metal is TC4 titanium alloy sheet and the fine aluminium aluminium sheet of 50mm * 40mm * 2mm, the super-purified aluminium welding wire after cleaning is cut into segment puts into graphite crucible, crucible is put into electric furnace be heated to 750 ℃, is incubated one hour and makes the temperature of aluminum liquid homogenising.Chloride, fluoride mixing brazing flux or NOCOLOK brazing flux are dissolved in acetone make the tow sides that are applied to after suspension in titanium sheet edge 15mm scope, a side that the titanium plate is scribbled brazing flux after air-dry is dipped vertically in aluminium liquid, after immersion plating 1min, the titanium plate is at the uniform velocity extracted out with the speed of 2cm/s, naturally cooling.The aluminium sheet overlap is removed oxide and greasy dirt with sand paper and acetone cleaning, fluoride flux is applied to aluminizes titanium plate and aluminium sheet overlap and be assembled into lap joint, lap of splice 10mm.Appropriate al-si filler metal is positioned over lap joint one side, with imflammable gas flame (acetylene+oxygen, carburizing flame and neutral flame in conjunction with) heating successively melts brazing flux and solder, after the solder fusing, overlap is imposed 20KHz/s ultrasonic vibration to solder and solidify, postwelding can get the good titanium of brazing quality, aluminium lap joint.Stretch test result shows that test specimen ruptures in aluminum substrate, not from the soldering interface cracking, soldering interface is described in conjunction with good, and soldered fitting has the intensity higher than aluminum mother plate, sees Fig. 3.
Embodiment 4
Mother metal is TC4 titanium alloy sheet and the fine aluminium aluminium sheet of 50mm * 40mm * 2mm, the super-purified aluminium welding wire after cleaning is cut into segment puts into graphite crucible, crucible is put into electric furnace be heated to 700 ℃, is incubated one hour and makes the temperature of aluminum liquid homogenising.The NOCOLOK brazing flux is dissolved in acetone makes the tow sides that are applied to after suspension in titanium sheet edge 10mm scope, a side that the titanium plate is scribbled brazing flux after air-dry is dipped vertically in aluminium liquid, after immersion plating 2min, the titanium plate is at the uniform velocity extracted out with the speed of 2.5cm/s, naturally cooling.The aluminium sheet overlap is removed oxide and greasy dirt with sand paper and acetone cleaning, the NOCOLOK brazing flux is applied to aluminizes titanium plate and aluminium sheet overlap and be assembled into lap joint, lap of splice 8mm.Appropriate al-si filler metal (depending on the overlap joint area) is positioned over lap joint one side, with imflammable gas flame (acetylene+oxygen, carburizing flame and neutral flame in conjunction with) heating successively melts brazing flux and solder, after the solder fusing, overlap is imposed 20KHz/s ultrasonic vibration to solder and solidify, postwelding can get the good titanium of brazing quality, aluminium lap joint.
Embodiment 5
Mother metal is TC4 titanium alloy sheet and the fine aluminium aluminium sheet of 50mm * 40mm * 2mm, the super-purified aluminium welding wire after cleaning is cut into segment puts into graphite crucible, crucible is put into electric furnace be heated to 700 ℃, is incubated one hour and makes the temperature of aluminum liquid homogenising.The NOCOLOK brazing flux is dissolved in acetone makes the tow sides that are applied to after suspension in titanium sheet edge 20mm scope, a side that the titanium plate is scribbled brazing flux after air-dry is dipped vertically in aluminium liquid, after immersion plating 3min, the titanium plate is at the uniform velocity extracted out with the speed of 2cm/s, and is naturally cooling.The aluminium sheet overlap is removed oxide and greasy dirt with sand paper and acetone cleaning, the NOCOLOK brazing flux is applied to aluminizes titanium plate and aluminium sheet overlap and be assembled into lap joint, lap of splice 18mm.Appropriate al-si filler metal (depending on the overlap joint area) is positioned over lap joint one side, with imflammable gas flame (acetylene+oxygen, carburizing flame and neutral flame in conjunction with) heating successively melts brazing flux and solder, after the solder fusing, overlap is imposed 20KHz/s ultrasonic vibration to solder and solidify, postwelding can get the good titanium of brazing quality, aluminium lap joint.
main points of the present invention are at first the titanium plate to be carried out hot-dip aluminizing before soldering, make follow-up titanium, the aluminium soldering process changes the soldering of aluminium sheet and aluminium coated into, this method has improved al-si filler metal in the wetting and spreading ability on titanium plate surface of aluminizing, solved the difficult problem that al-si filler metal in the brazing process is difficult to wetting titanium mother metal, utilize simultaneously the stratiform continuous distributed of the broken joint brazing interfacial reaction layer of the acoustic streaming effect of ultrasonic vibration and cavitation intermetallic compound and make its granulating, dispersion, be conducive to obtain high-quality titanium-aluminum dissimilar metal soldered fitting, the present invention is suitable for practical engineering application, significant in the further application of aerospace field to enlarging titanium-aluminum dissimilar metal composite component.
Claims (5)
1. a titanium, the ultrasonic booster flame method for welding of aluminum dissimilar metal, is characterized in that, specifically comprises the following steps:
(1) titanium plate surface heat dip calorizing
The super-purified aluminium welding wire section of being cut into that surface treatment is clean is put into graphite crucible, graphite crucible is heated to 700 ℃～750 ℃ makes the super-purified aluminium welding wire fusing, and insulation is above to guarantee the temperature of aluminum liquid homogenising half an hour; To be connected titanium plate end removal oxide-film and greasy dirt; The NOCOLOK brazing flux is dissolved in acetone forms suspension, brush in the positive and negative surface of the end of titanium plate 10～20mm width; The titanium plate that will scribble brazing flux one side after the acetone volatilization is dipped vertically in aluminium liquid, keeps at the uniform velocity extracting out with the speed of 2cm/s～3cm/s after 0.5～3min, completes hot-dip, forms aluminium coated;
(2) the aluminize ultrasonic booster flame soldering of titanium plate and aluminium sheet
The aluminium sheet overlap is removed surface film oxide and greasy dirt, the NOCOLOK brazing flux is applied to overlap, titanium plate and the aluminium sheet completed after hot-dip aluminizing are assembled into lap joint, lap width is less than the aluminium coated width, al-si filler metal is positioned over overlap one side, with the heating of imflammable gas flame, NOCOLOK brazing flux and al-si filler metal are successively melted, ultrasonic vibration is imposed on joint overlap to al-si filler metal solidify, obtain titanium, aluminium lap joint.
2. a kind of titanium according to claim 1, the ultrasonic booster flame method for welding of aluminum dissimilar metal is characterized in that: described NOCOLOK brazing flux or be active stronger chloride and fluoride mixing brazing flux.
3. a kind of titanium according to claim 1, the ultrasonic booster flame method for welding of aluminum dissimilar metal, it is characterized in that: described imflammable gas flame is acetylene and oxygen flame.
4. a kind of titanium according to claim 1, the ultrasonic booster flame method for welding of aluminum dissimilar metal is characterized in that: super-purified aluminium welding wire in described step (1), that surface treatment is clean is for adopting the acetone wiping to remove the super-purified aluminium welding wire surface and oil contaminant.
5. a kind of titanium according to claim 1, the ultrasonic booster flame method for welding of aluminum dissimilar metal, is characterized in that: in described step (2), the aluminium sheet overlap is removed surface film oxide and greasy dirt for adopting sand paper and acetone cleaning wipe oil.
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| CN103433584A (en) * | 2013-06-19 | 2013-12-11 | 哈尔滨工业大学 | Medium-temperature brazing method of dissimilar metals of titanium and aluminium under atmospheric condition |
| CN103565287A (en) * | 2013-11-12 | 2014-02-12 | 哈尔滨工业大学 | Titanium pot with composite aluminum bottom and manufacturing method thereof |
| CN103839845A (en) * | 2014-03-25 | 2014-06-04 | 哈尔滨工业大学 | Method for manufacturing high-temperature service low-resistance connector through induced reaction of silicon/metal energy-contained modulation film |
| CN104651898A (en) * | 2015-02-09 | 2015-05-27 | 大连理工大学 | Preparation method of intermetallic compound membrane |
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| CN113263259A (en) * | 2021-05-24 | 2021-08-17 | 上海工程技术大学 | Micro-vibration assisted laser lap welding method for aluminum-silicon plated hot formed steel |
| CN113963868A (en) * | 2021-11-26 | 2022-01-21 | 辽宁东科电力有限公司 | Method for repairing post insulator porcelain body and flange by using welding mode |
| CN113963868B (en) * | 2021-11-26 | 2024-03-26 | 辽宁东科电力有限公司 | Method for repairing porcelain body and flange of post insulator by welding mode |
| CN115138936A (en) * | 2022-08-16 | 2022-10-04 | 上海交通大学 | Method for eliminating aluminum alloy hot cracks of aluminum-titanium laser welding and brazing lap joint |
| CN115351446A (en) * | 2022-09-01 | 2022-11-18 | 兰州理工大学 | Aluminum/copper dissimilar metal plasma arc welding method with ultrasonic assistance and nanoparticle coupling reinforcement |
| CN115351446B (en) * | 2022-09-01 | 2024-01-30 | 兰州理工大学 | Ultrasonic-assisted and nanoparticle-coupled reinforced aluminum/copper dissimilar metal plasma arc welding method |
| CN117564387A (en) * | 2024-01-15 | 2024-02-20 | 烟台大学 | Method for preparing dissimilar metal composite structure by rotary hot dip connection and additive |
| CN117564387B (en) * | 2024-01-15 | 2024-03-15 | 烟台大学 | Method for preparing dissimilar metal composite structure by rotary hot dip connection and additive |
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